LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2019 >> Cruze L >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Vehicle Access System >> Diagnostic Information and Procedures >> Trunk Release Malfunction >> Circuit/System Testing

Circuit/System Testing

Test 1

    NOTE:

    It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.

  1. Ignition/Vehicle & All vehicle systems - Off
  2. Disconnect the electrical connector: S58A Rear Compartment Lid Unlatch Switch - Exterior
  3. Test for less than 10 ohms between the test points: Ground circuit terminal 1 & Ground
    • If 10 ohms or greater 
    1. Ground Connection - Disconnect
    2. Test for less than 2 ohms between the test points: Ground circuit terminal 1 @ Component harness & Ground Connection
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Repair the open/high resistance in the ground connection.
    • Go to next step: If less than 10 ohms 
  4. Ignition - On/Vehicle - In Service Mode
  5. Verify the scan tool parameter: Trunk Lid/Liftgate Window Exterior Unlatch Switch = Inactive
    • If not the specified state 
    1. Ignition/Vehicle - Off
    2. Disconnect the electrical connector: K9 Body Control Module
    3. Test for infinite resistance between the test points: Signal circuit terminal 2 @ Component harness & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • If infinite resistance - Replace the component: K9 Body Control Module
    • Go to next step: If the specified state 
  6. Connect a 3 A fused jumper wire between the test points: Signal circuit terminal 2 & Ground circuit terminal 1
  7. Verify the scan tool parameter: Trunk Lid/Liftgate Window Exterior Unlatch Switch = Active
    • If not the specified state 
    1. Ignition/Vehicle - Off & Remove - Jumper wire(s)
    2. Disconnect the electrical connector: K9 Body Control Module
    3. Ignition - On/Vehicle - In Service Mode
    4. Test for less than 1 V between the test points: Signal circuit terminal 2 @ Component harness & Ground
      • If 1 V or greater - Repair the short to voltage on the circuit.
      • Go to next step: If less than 1 V
    5. Ignition/Vehicle - Off
    6. Test for less than 2 ohms between the test points: Signal circuit terminal 2 @ Component harness & Terminal 15 X6 @ Control module harness
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component: K9 Body Control Module
    • Go to next step: If the specified state 
  8. Test or replace the component: S58A Rear Compartment Lid Unlatch Switch - Exterior

Test 2

    NOTE:

    It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.

  1. Ignition/Vehicle & All vehicle systems - Off
  2. Disconnect the electrical connector: S58B Rear Compartment Lid Unlatch Switch - Interior
  3. Test for less than 10 ohms between the test points: Ground circuit terminal 1 & Ground
    • If 10 ohms or greater 
    1. Ground Connection - Disconnect
    2. Test for less than 2 ohms between the test points: Ground circuit terminal 1 @ Component harness & Ground Connection
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Repair the open/high resistance in the ground connection.
    • Go to next step: If less than 10 ohms 
  4. Ignition - On/Vehicle - In Service Mode
  5. Verify the scan tool parameter: Interior Trunk Lid/Liftgate Window Unlatch Switch = Inactive
    • If not the specified state 
    1. Ignition/Vehicle - Off
    2. Disconnect the electrical connector: X6 @ K9 Body Control Module
    3. Test for infinite resistance between the test points: Signal circuit terminal 3 @ Component harness & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • If infinite resistance - Replace the component: K9 Body Control Module
    • Go to next step: If the specified state 
  6. Connect a 3 A fused jumper wire between the test points: Signal circuit terminal 3 & Ground circuit terminal 1
  7. Verify the scan tool parameter: Interior Trunk Lid/Liftgate Window Unlatch Switch = Active
    • If not the specified state 
    1. Ignition/Vehicle - Off & Remove - Jumper wire(s)
    2. Disconnect the electrical connector: X6 @ K9 Body Control Module
    3. Ignition - On/Vehicle - In Service Mode
    4. Test for less than 1 V between the test points: Signal circuit terminal 3 @ Component harness & Ground
      • If 1 V or greater - Repair the short to voltage on the circuit.
      • Go to next step: If less than 1 V
    5. Ignition/Vehicle - Off
    6. Test for less than 2 ohms between the test points: Signal circuit terminal 3 @ Component harness & Terminal 14 X6 @ Control module harness
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component: K9 Body Control Module
    • Go to next step: If the specified state 
  8. Test or replace the component: S58B Rear Compartment Lid Unlatch Switch - Interior

Test 3

    NOTE:

    It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.

  1. Ignition/Vehicle & All vehicle systems - Off
  2. Disconnect the electrical connector: M40 Rear Compartment Lid Latch
  3. Test for less than 10 ohms between the test points: Ground circuit terminal 2 & Ground
    • If 10 ohms or greater 
    1. Ground Connection - Disconnect
    2. Test for less than 2 ohms between the test points: Ground circuit terminal 2 & Ground Connection
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Repair the open/high resistance in the ground connection.
    • Go to next step: If less than 10 ohms 
  4. Verify the fuse is not open: F22DA
    • If the fuse is open 
    1. Replace the component: Fuse
    2. Verify the fuse does not open.
      • If the fuse opens - Test or replace the component: X51A Fuse Block - Instrument Panel
      • If the fuse does not open, go to the next step.
    • Go to next step: If the fuse is not open 
  5. Connect a test lamp between the test points: Control circuit terminal 1 & Ground circuit terminal 2
  6. Ignition - On/Vehicle - In Service Mode
  7. Perform the scan tool control function: Trunk Lid Unlatch Command - Unlatch

    Verify the test lamp does not turn On and Off.

    • If the test lamp turns On and Off 

      Test or replace the component: M40 Rear Compartment Lid Latch

    • Go to next step: If the test lamp does not turn On and Off 
  8. Ignition/Vehicle - Off
  9. Disconnect the electrical connector: X4 @ K9 Body Control Module
  10. Ignition - On/Vehicle - In Service Mode
  11. Test for less than 1 V between the test points: Control circuit terminal 10 X4 @ Control module harness & Ground
    • If 1 V or greater 

      Replace the component: X51A Fuse Block - Instrument Panel

    • Go to next step: If less than 1 V 
  12. Momentarily connect a 3 A fused jumper wire between the test points: Control circuit terminal 10 X4 & B+

    Verify the test lamp turns On and Off.

    • If the test lamp does not turn On and Off 
    1. Ignition/Vehicle - Off & Remove - Test lamp
    2. Test for less than 10 ohms between the test points: Control circuit terminal 1 @ M40 Rear Compartment Lid Latch & Ground
    • If 10 ohms or greater 

      Replace the component: X51A Fuse Block - Instrument Panel

    • Go to next step: If the test lamp turns On and Off 
  13. Connect the electrical connector: X4 @ K9 Body Control Module
  14. Ignition - On/Vehicle - In Service Mode
  15. Perform the scan tool control function: Trunk Lid Unlatch Command - Unlatch

    Verify the test lamp turns On and Off.

    • If the test lamp does not turn On and Off 

      Replace the component: K9 Body Control Module

    • Go to next step: If the test lamp turns On and Off 
  16. Test or replace the component: M40 Rear Compartment Lid Latch
scientia non olet · About LEMON Manuals